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D.2.3.8 fibonacci

Procedure from library general.lib (see general_lib).

Usage:
fibonacci(n); n,p integers

Return:
fibonacci(n): nth Fibonacci number, f(0)=f(1)=1, f(i+1)=f(i-1)+f(i)
- computed in characteristic 0, of type bigint

Example:
 
LIB "general.lib";
fibonacci(42);
==> 267914296
See also: prime.

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